The performance of a migrating corrosion inhibitor suitable for reinforced concrete

W. MORRIS; A. VICO; M. VAZQUEZ

JOURNAL OF APPLIED ELECTROCHEMISTRY

SPRINGER

Año: 2003 vol. 33 p. 1183 - 1189

0021-891X

The protection provided by a migrating corrosion inhibitor (MCI) based on an alkylaminoalcohol was tested onconcrete specimens containing reinforcing steel bar (rebar) segments. Two inhibitor dosages were investigated,together with two water/cement ratios and various chloride contents. The inhibition efficiency was followed over aperiod of 1000 days measuring electrical and electrochemical parameters such as the corrosion potential, thecorrosion current density, the electrical resistance and performing electrochemical impedance spectra. The inhibitorwas able to reduce the corrosion rate only when the initial chloride content was below 0.16 wt.% (percent weightrelative to cement content). The efficiency increased as the water/cement ratio increased. There was no beneficialeffect when the initial chloride content was greater than 0.43 wt.%. The efficiency of the product increased when theamount of inhibitor being applied doubled.